EGS with poly water pipe

[FrancisDoody]

Since the city water suppy enters the residence via a poly pipe and there are no other suitable primary grounding electrodes available to statisfy 250.53. I must bond the copper water pipes using Table 250.66. My conductor is 4/0 AL so I believe a bare #4 would be correct. Would you agree.
Thanks

 

[Dennis Alwon]

Since the city water suppy enters the residence via a poly pipe and there are no other suitable primary grounding electrodes available to statisfy 250.53. I must bond the copper water pipes using Table 250.66. My conductor is 4/0 AL so I believe a bare #4 would be correct. Would you agree.
Thanks

I agree but it need not be bare.-- if we are talking copper.

I should clarify. If the egc is copper then #4 is good otherwise #2 aluminum

 

[jxofaltrds]

If you have multiple occupany it only needs to be a #6. Go figure. If I am reading 250.104(A)(2) correctly.

 

[jxofaltrds]

Since the city water suppy enters the residence via a poly pipe and there are no other suitable primary grounding electrodes available to statisfy 250.53. I must bond the copper water pipes using Table 250.66. My conductor is 4/0 AL so I believe a bare #4 would be correct. Would you agree.
Thanks

PS

I re-read your post. Are you saying you have NO electrodes?

 

[Dennis Alwon]

PS

I re-read your post. Are you saying you have NO electrodes?

That is what he is saying.

 

[Dennis Alwon]

If you have multiple occupany it only needs to be a #6. Go figure. If I am reading 250.104(A)(2) correctly.

This is true but that only applies to the specific install they mention-- where all copper pipes are isolated from the other occupancies by nonmetalic pipe and it would be bonded at the panel for that occupancy not the main service.

 

[jxofaltrds]

That is what he is saying.

I just hope he has not forgotten about 250.24.